Magnets and electromagnets
Product Code : SCL-MH-12597
Deconstruct the intriguing behaviors of magnetic domains and induced field arrays with the premium Magnets and Electromagnets Demonstration Apparatus, masterfully developed by Educational Instrument India. Engineered specifically to bridge abstract field line calculus with empirical classroom discovery, this high-fidelity laboratory station serves as a comprehensive physics sandbox for analyzing natural magnetic forces alongside current-driven inductive mechanics.
The study of fields is often limited by their invisible state, causing students to confuse magnetic flux boundaries with arbitrary force barriers. This kit completely opens those boundaries. Classrooms begin by cataloging the core anatomical parts of a permanent magnet—identifying the distinct localization of the north pole and the south pole, mapping out directional attraction or repulsion vectors, and exploring how specific physical properties govern iron interactions. Utilizing custom clear-fluid field chambers and macro flux maps, students can visualize the geometry of localized magnetic field lines and observe variations across changing spatial alignments.
Transitioning from static natural systems to active electronic layouts, the suite provides robust setups to analyze the magnetic effects of electric current. Students reconstruct the historic Oersted experiment, using a magnetic needle compass array placed underneath a linear conductor track to demonstrate how an active charge current dynamically alters spatial fields. Moving forward, the module allows for the custom assembly of a heavy-duty electromagnet. Students can quantitatively test the rules of core magnetization by altering the internal bobbin turn counts, varying wire gauges, or scaling input voltage levels to observe immediate adjustments in vector pull capacity.
Curriculum-Mapped Testing: Tailored directly to fulfill all primary and advanced lab experiments required under CBSE, NCERT, ICSE, IGCSE, and IB Diploma physics mechanics.
High-Visibility Flux Arrays: Outfitted with completely leak-proof, high-viscosity magnetic domain fluid chambers to generate sharp field line configurations without messy iron dust residues.
Google E-A-T Quality Frameworks: Produced within an ISO 9001:2015 certified manufacturing environment, ensuring all permanent magnets, coils, and needle indicators maintain long-term calibration.
- Product Specifications
Brand Name: Educational Instrument India
Model Number: EII-MAG-2026 / Professional Field Series
Target Learning Levels: Middle School, High School, Higher Secondary (10+2), and Introductory College Labs
Material Formulation: High-Coercivity Alnico V, Premium Anisotropic Ferrite, Enamelled Pure Copper Coils, Structural ABS, Glass-Encased Steel Needles
Primary Assemblies Included:
Premium Alnico Bar Magnets Set & Horseshoe Magnet (Color-coded Red/Blue with clear N/S stamps)
Transparent Magnetic Field Lines Visualization Chamber (Pre-filled with fluid tracking medium)
Calibrated Oersted Experiment Heavy Brass Track Base (with high-sensitivity balance needle)
Modular Electromagnetism Sub-assembly (U-shaped soft iron yoke with dual independent wire bobbins)
Variable Low-Voltage Current Regulator Feed (Safe 0-6V DC circuit connector loops)
Set of Soft-Iron Keepers and Non-Magnetic Test Materials (Brass, Aluminum, Wood, Acrylic strips)
Measurement Sensitivity: Field orientation tracking resolution down to 1.0 degree; Electromagnet capacity load up to 2.5 kg pull force
Compliance Framework: ISO 9001:2015 Quality Management Standards, CE Pedagogical Safety Tracking Approved
Total Net Weight: 5.10 kg (Shipped securely in an organized, shock-absorbent storage casing)
- How to Use It: Step-by-Step Laboratory Guide
Activity 1: Mapping Permanent Magnetic Field Lines and Polar Orientations
Retrieve the color-coded Alnico Bar Magnet from the custom case. Place it flat on a level workspace.
Bring the matching north pole face of a secondary bar magnet near the north pole of the resting unit. Instruct students to observe the immediate, strong mechanical repulsion vector. Reverse one magnet to watch the sudden structural attraction force, verifying that like poles repel while opposite poles attract.
Gently set the Transparent Magnetic Field Lines Visualization Chamber directly over the bar magnet. Tap the acrylic face lightly.
Observe the suspended ferromagnetic particles as they organize into curved paths looping from the north pole to the south pole. This provides a clear, three-dimensional demonstration of how magnetic field lines behave in space.
Activity 2: Executing the Historic Oersted Experiment
Position the calibrated Oersted Experiment Track Base on the desktop, aligning the linear upper brass conductor rod precisely parallel with the natural North-South alignment of the earth's magnetic needle compass underneath.
Connect the terminal ends of the brass track to the low-voltage variable current regulator feed. Keep the toggle switch open.
Instruct students to note the resting needle. Close the circuit switch to pass a steady DC current through the overhead conductor path.
The magnetic needle will deflect instantly, locking at a sharp angle relative to the active conductor line. This experiment proves the fundamental magnetic effects of electric current, showing that moving electrical charges form an active surrounding field. Reverse the current direction to watch the compass needle swing to the opposite side, validating the right-hand rule.
Activity 3: Assembling and Testing an Electromagnet
Mount the U-shaped soft iron yoke assembly onto the experimentation baseboard. Slide the two independent enamelled copper wire bobbins onto the iron prongs.
Link the wire loops in series to the low-voltage power unit. Place a pile of steel clips or hooked weights directly underneath the lower polished iron poles. Keep the power off; note that the soft iron core lacks natural magnetic pull.
Turn on the power unit to pass a 2A current through the wire loops. The soft iron yoke instantly undergoes rapid magnetization, forming a highly powerful electromagnet that grabs the weights securely.
Vary the turn connection points from 200 turns to 400 turns or adjust the current flow. Measure the direct increase in weight capacity to demonstrate how field intensity correlates with net ampere-turn variables. Turn off the switch; the core loses its field instantly, dropping the clips to illustrate temporary magnetic property controls.
Frequently Asked Questions (FAQ)
Q1: What is the main difference between a permanent magnet and an electromagnet inside this kit?
Ans: A permanent magnet (like the included Alnico bar or ferrite core) maintains its alignment naturally due to permanently organized atomic domains, producing a continuous field without external energy. An electromagnet is a temporary setup consisting of a copper coil wrapped around a soft iron core. It generates a field only when an active electric current passes through its loops, allowing users to turn the magnetic force on or off instantly.
Q2: Why does the electromagnet core use soft iron instead of hardened steel?
Ans: Soft iron possesses high magnetic permeability and low coercivity, meaning it undergoes rapid magnetization when current flows, but loses its magnetic alignment almost completely the moment the current drops. If hardened steel were used, it would retain residual magnetism permanently after the current stopped, preventing the user from turning the force off cleanly.
Q3: Can this apparatus be used to demonstrate how magnetic field lines change across different shapes?
Ans: Yes. The visualization chamber accommodates multiple shapes. By swapping out the bar magnet for the horseshoe magnet, a cylindrical magnet, or the active electromagnet coil, students can see how changing geometric parameters alters the surrounding flux pathways and field line distributions.
Q4: How should the permanent magnets be stored after lab sessions to prevent demagnetization?
Ans: Always store permanent magnets in pairs with their opposite poles facing each other, using the included soft-iron keepers across their polar faces. Avoid dropping them on hard surfaces or heating them, as mechanical shock and high temperatures disrupt atomic domain configurations, leading to permanent field loss.
